Hunan Zhengdi Biological Resources Development Co. Ltd. is a cGMP, ISO certificated factory, dedicated to R&D and manufacturing of botanical extracts that serves the Nutraceutical, Pharmaceutical, and Feed Industries, Our main products covers Mucuna Pruriens extract (L-dopa), Spirulina, Rosemary Extract, Citrus Aurantium Extract, and Eucommia leaf extract. Owe to professional team and strong R&D capability, we prove to be the largest L-dopa manufacturer in China, and also the only Chinese factory who can produce the true macuna pruriens extract with L-dopa content of 80% or less.